Methods, devices, and systems for improved oxygenation patient monitoring, mixing, and delivery
AssigneeVapotherm, Inc.
InventorJohn C. Taube
Life of this patent
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Abstract
A computer implemented method is disclosed for providing adaptive control of a gas mixture for delivery to a patient via a separate external gas blender system. The computer implemented method includes receiving first SpO2 data from a regional oximeter via a regional oximeter interface; determining first PaO2 data using a first lookup table derived from a first sigmoid shaped oxyhemoglobin dissociation curve; determining a first gas mixture value using the first PaO2 data; and transmitting first adaptive feedback control data including the first gas mixture value to the separate external gas blender system via a gas blender interface.
Claims20
A system for controlling a gas blender system configured to deliver a gas mixture with a target FiO2 to a patient, the system comprising:
- at least one processor electronically coupled to the gas blender system;
- and
- a memory electronically coupled to the at least one processor, the memory containing a set of instructions, wherein the instructions, when executed by the processor, cause the processor to:
- receive a target PaO2 value from a user via a user interface;
- receive a first measured SpO2 value from a pulse oximeter functionally connected to the at least one processor;
- convert the first measured SpO2 value to a first measured PaO2 value using a first lookup table derived from a sigmoid shaped oxyhemoglobin dissociation curve, the first lookup table stored in the memory;
- calculate a first error value as a difference between the first measured PaO2 and the target PaO2;
- process the first error value to determine a first oxygen mixer control value, by executing an algorithm using at least one of proportional values, integral values, or derivative values;
- receive a second measured SpO2 value from a regional oximeter functionally connected to the at least one processor and configured to measure cerebral blood oxygen saturation;
- convert the second measured SpO2 value to a second measured PaO2 value using a second lookup table derived from a sigmoid shaped oxyhemoglobin dissociation curve, the second lookup table stored in the memory;
- calculate a second error value as a difference between the second measured PaO2 and the target PaO2;
- process the second error value to determine a second oxygen mixer control value, by executing an algorithm using at least one of proportional values, integral values, or derivative values;
- and
- if the system is operating in a first mode, output the first oxygen mixer control value to a blender controller configured to cause the gas blender system to deliver the gas mixture to the patient with the target FiO2 value, or
- if the system is operating in a second mode, output the second oxygen mixer control value to the blender controller configured to cause the gas blender system to deliver the gas mixture to the patient with the target FiO2 value.
A computer implemented method for controlling a gas blender system to deliver a gas mixture with a target FiO2 to a patient, the method comprising:
- receiving, by a processor of the gas blender system, a target PaO2 value from a user via a user interface;
- receiving, by the processor, a first measured SpO2 value from a pulse oximeter;
- converting, by the processor, the first measured SpO2 value to a first measured PaO2 value using a first lookup table derived from a sigmoid shaped oxyhemoglobin dissociation curve;
- calculating, by the processor, a first error value as a difference between the first measured PaO2 and the target PaO2;
- processing, by the processor, the first error value to determine a first oxygen mixer control value, by executing an algorithm using at least one of proportional values, integral values, or derivative values;
- receiving, by the processor, a second measured SpO2 value from a regional oximeter functionally connected to the at least one processor and configured to measure cerebral blood oxygen saturation;
- converting, by the processor, the second measured SpO2 value to a second measured PaO2 value using a second lookup table derived from a sigmoid shaped oxyhemoglobin dissociation curve;
- calculating, by the processor, a second error value as a difference between the second measured PaO2 and the target PaO2;
- processing, by the processor, the second error value to determine a second oxygen mixer control value, by executing an algorithm using at least one of proportional values, integral values, or derivative values;
- and
- if the system is operating in a first mode, outputting, by the processor, the first oxygen mixer control value to a blender controller and cause the gas blender system to deliver the gas mixture to the patient with the target FiO2 value, or
- if the system is operating in a second mode, outputting, by the processor, the second oxygen mixer control value to the blender controller and cause the gas blender system to deliver the gas mixture to the patient with the target FiO2 value.
Dependencies are inferred from the claim text.